platt



G.H[PLATT.

SHIP'S BLOCK.

No. 10,059. Patented Sept. 27, 1853.

WI. NORRIS PETERS co, Puomuma, wpsnmcrun. n r.

UNITED %TATB@ PATENT DFFTGE,

CHARLES H. PLATT, OF NEW YORK, N. Y.

SHIPS BLOCK.

Specification of Letters Patent No.

I0 all whom it may concern:

Be it known that T, C. H. Pnarr, of the city, county, and State of few York, have invented certain new and useful Improvements in Blocks for Ships Tackles, 850.; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the annexed drawings, making apart of this specifica tion, in which Figure 1, is a front view of the improved block. Fig. 2, is a side view of ditto.

Similar letters of reference indicate corresponding parts in both figures.

This invention relates to certain improve ments in blocks for ships tackles, &c., and consists 1st. In having metal rods pass through the cheeks, transversely of their fiber; said rods securing the upper and lower plates to the cheeks, and also forming the staple of the block. The rods, by passing through the cheeks, transversely of their fiber, effectually prevent the cheeks from warping or splitting, and therefore render unnecessary the employment of the ordinary strap, which but imperfectly answers the purose. p 2nd. My invention consists in permanently supporting the axis or shaft of the pulley in the checks, by means of rods, on the top ends of which, the axis or shaft rests, as will be hereafter explained.

To enable others skilled in the art to fully understand and construct my invention, 1 will proceed to describe it.

A, A, represent the checks of the block, constructed of wood, and of the usual form. Between the cheeks is placed the pulley, B, which runs loosely on the axis or shaft C; the ends of the shaft passing through the cheeks. Underneath the shaft, G, and at each end, there is a metal rod, D; see red lines in both figures. The tops or upper ends of these rods bear against the ends of the shaft, 0, and prevent the shaft from wearing the cheeks and becoming loose therein, in consequence of heavy pressure upon the pulley, B. The shaft, C, has a square, ((6), at one end, which is fitted in one of the cheeks, and prevents the turning of the shaft; see Fig. 1. The rods, D, D, are placed or pitted in the cheeks, A, A; and extend from the shaft to the lower end of the cheeks, as seen in both figures.

E, E, are metal rods of a suitable thick- 10,059, dated September 2?, 1853.

ncss, which pass through the cheeks, A, A, transversely of their fiber; two rods through each cheek. These rods pass through the lower and upper plates, F, G, and secure the plates to the checks. The rods, E, are headed at their lower ends, against the plate, F; the heads being represented by (b), and where the rods pass through the upper plates, G, they are somewhat bent, as seen in Fig. 2. The heads, (1)), it will be .seen, secure the lower plate, F, to the cheeks;

and the rods, by being bent as they pass through the upper plate, Gr, secure it to the cheeks.

The plates, it will be understood, connect the cheeks, and secure them at the proper distance apart.

The two rods that pass through each cheek, A, are connected at their upper ends, and bent in semi-circular or how form, as seen in Fig. 1; and the two bows are in contact at their upper parts, as seen in Fig. 2, in consequence of the rods being bent where they pass through the upper plate, G. The two bows form a staple, on which is secured the hook, H.

By the above arrangement it will be seen, 1st, that, by having the rods, E, pass through the cheeks, A, A, in a direction transversely of their fiber, the cheeks are prevented from warping or splitting; and the rods also secure the plates, F, G, to the cheeks, and also form a staple for the hook, H; and, 2nd, that, by employing the rods, D, D, the ends of the shaft, C, of the pulley, B,.are prevented from wearing the cheeks, or becoming loose therein, in consequence of heavy pressure upon the pulley; because the rods, being of metal, form a durable bearing for the ends of the shafts, and will sustain any pressure of the shaft.

Thus it will be seen that a strong, durable, and economical block is obtained by my invention.

The ordinary blocks in use are comparatively expensive to make; an iron strap being attached to the outer surface of each cheek, and the plates being screwed or bolted to the cheeks.

I do not claim the plates, F, G, for the purpose of securing the checks the proper distance apart; for they have been previously used. But,

What I claim as my invention, and desire to secure by Letters Patent, is,

1. The employment or use of the rods, E,

passing through the cheeks, A, A, in a direction transversely of their fibers, for the purpose of preventing the splitting of the cheeks; said rods also securing the plates,

F, G, to the cheeks, and forming a staple for the hook, H, as herein shown and described.

2. I also claim the rods, D, D, placed underneath the ends of the shaft, 0, for the purpose of preventing the Wearing of the 10 cheeks, and thereby forming durable bearings for the shaft, as set forth in the body of the specification.

CHAS. H. PLATT.

Vitnesses:

O. D. MUNN, R. W. FENWICK. 

